Full list of all 35 Fallout Shelter achievements worth 1,000 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Xbox One.
Collected 20 Legendary Outfits
Crafted every Theme
Completed 100 Quests
Completed 100 objectives
Changed the appearance of 10 Dwellers in the Barbershop
Successfully stopped 50 Raider Attacks
Leveled up a Dweller from level 1 to 50
Crafted an Outfit, a Weapon and a Theme
Completed 60 Quests
Scrapped 500 items
Made 25 dialogue choices on Quests
Collected all Fragments of 4 Theme Recipes
Collected 100 Stimpaks and 100 RadAway on Quests
Collected all Fragments of a Theme Recipe
Completed 30 Quests
Upgraded 20 Rooms to Level 3
Built 1 of every room type
Killed 500 enemies on Quests
Crafted 10 Weapons
Crafted 10 Outfits
Completed 10 Quests
Built 50 rooms
Leveled up a dweller from Level 1 to 25
Killed 10 Quest Bosses
Made 25 Babies
Successfully completed 50 Room Rushes
Built 25 rooms
Collected 10,000 Caps
Leveled up a dweller from Level 1 to 10
Merged 3 Food Rooms
Merged 3 Power Rooms
Merged 3 Water Rooms
Collected 1,000 Caps
Collect 20 Legendary Weapons
Collect 20 Legendary Dwellers